A5100675533- Complex Systems and Time Series Analysis
- Market Dynamics and Volatility
- Complex Network Analysis Techniques
- Magnetic confinement fusion research
- Ionosphere and magnetosphere dynamics
- Financial Markets and Investment Strategies
- Particle accelerators and beam dynamics
- Monetary Policy and Economic Impact
- Opinion Dynamics and Social Influence
- Bioinformatics and Genomic Networks
- Laser-Plasma Interactions and Diagnostics
- Stock Market Forecasting Methods
- Chaos control and synchronization
- Gene expression and cancer classification
- Fractal and DNA sequence analysis
- Solar and Space Plasma Dynamics
- Quantum Mechanics and Non-Hermitian Physics
- Statistical Methods and Inference
- Cold Atom Physics and Bose-Einstein Condensates
- Earthquake Detection and Analysis
- Topological and Geometric Data Analysis
- Firm Innovation and Growth
- Advanced Neuroimaging Techniques and Applications
- Quantum chaos and dynamical systems
- Single-cell and spatial transcriptomics
University of Delhi
2008-2024
Institute for Plasma Research
1999-2023
Indira Gandhi National Open University
2017-2022
Apollo Proton Cancer Centre
2022
Indian Institute of Forest Management
2020
ETH Zurich
2020
Technical University of Darmstadt
2017-2018
Indian Institute of Science Education and Research Pune
2015-2017
Central Research Institute
2015
Hemwati Nandan Bahuguna Garhwal University
1984
Random matrix theory (RMT) and network methods are applied to investigate the correlation properties of 20 financial indices. The results compared before during crisis 2008. In RMT method, components eigenvectors corresponding second largest eigenvalue form two clusters indices in positive negative directions. these switch opposite directions crisis. analysis uses Fruchterman-Reingold layout find at different thresholds. At a threshold 0.6, crisis, Americas, Europe, Asia-Pacific separate...
Quantum systems lose coherence upon interaction with the environment and tend towards classical states. is known to exponentially decay in time so that macroscopic quantum superpositions are generally unsustainable. In this work, slower than exponential of coherences experimentally realized an atom-optics kicked rotor system subjected nonstationary Lévy noise applied kick sequence. The manifests form subdiffusion can be controlled through exponent. experimental results good agreement...
Disruptions, induced in Aditya tokamak by hydrogen gas puffing, are successfully mitigated through stabilization of magnetohydrodynamic (MHD) modes applying a bias voltage to an electrode placed inside the last-closed flux surface prior injection. Above threshold sheared Er × Bφ rotation plasma generated edge biasing leads substantial reduction growth MHD (m/n = 3/1, 2/1), which causes avoidance disruptions prevention mode overlapping and subsequent ergodization magnetic field lines.
In this mini-review, we critically examine the recent work done on correlation-based networks in financial systems. The structure of empirical correlation matrices constructed from market data changes as individual stock prices fluctuate with time, showing interesting evolutionary patterns, especially during critical events such crashes, bubbles, etc. We show that study and their evolution time is useful for extracting important information underlying dynamics. Also, present our perspective...
Genome-scale gene networks contain regulatory genes called hubs that have many interaction partners. These usually play an essential role in regulation and cellular processes. Despite recent advancements high-throughput technology, inferring with hub from high-dimensional data still remains a challenging problem. Novel statistical network inference methods are needed for efficient accurate reconstruction of data.To address this challenge we propose DW-Lasso, degree weighted Lasso (least...
Over the last 2 decades, financial systems have been studied and analyzed from perspective of complex networks, where nodes edges in network represent various components strengths correlations between them. Here, we adopt a similar network-based approach to analyze daily closing prices 69 global market indices across 65 countries over period 2000–2014. We study among by constructing threshold networks superimposed minimum spanning trees at different time frames. investigate effect critical...
Second harmonic heating experiments using fast waves are carried out on the Aditya tokamak in ion cyclotron resonance frequency (ICRF) range with help of a 200 kW, 20–40 MHz RF system, which is developed indigenously. Significant direct electron observed hydrogen plasma. The rise temperature prompt application power and increment increases linearly power. A corresponding increase plasma beta hence an stored diamagnetic energy also presence low-Z impurity radiation density do not...
An experimental set-up to investigate the effect of a biased electrode introduced in edge region on ADITYA tokamak discharges is presented. A specially designed double-bellow mechanical assembly fabricated for controlling location as well its exposed length inside plasma. The cylindrical molybdenum powered by capacitor-bank based pulsed power supply (PPS) using semiconductor controlled rectifier (SCR) switch with forced commutation. Langmuir probe array radial profile measurements plasma...
The objective of the paper is to analyse immediate impact demonetisation on Indian economy along with analysing barriers in moving towards cashless and investigates influence economy. Scale was constructed for measuring effectiveness responses were asked only from people who earning an income any source. Exploratory factor analysis (EFA) confirmatory (CFA) conducted respondents followed by structural equation modelling path analysis. Results suggested that demonetisation's main motive lay...
Design and development of a high power ultra-wideband, 3 dB tandem hybrid coupler is presented its application in ICRF heating the tokamak discussed. In order to achieve desired frequency band 38–112 MHz 200 kW handling capability, developed using two 3-element 8.34 ± 0.2 coupled lines sections tandem. multi-element lines, junctions are employed for joining elements that produce undesirable reactance called junction discontinuity effect. The effect becomes prominent (HF) very frequency(VHF)...
We report a novel approach for preparing Bose–Einstein condensate (BEC) of 87Rb atoms using an electro-pneumatically driven transfer into quadrupole-Ioffe magnetic trap (QUIC trap). More than 5 × from magneto-optical are loaded spherical quadrupole and then transferred Ioffe by moving the coil towards center thereby changing distance between coil. The efficiency is more 80%. This different conventional loading QUIC wherein transformed currents in coils. phase space density increased forced...
Inferring cell-signaling networks from high-throughput data is a challenging problem in systems biology. Recent advances cytometric technology enable us to measure the abundance of large number proteins at single-cell level across time. Traditional network reconstruction approaches usually consider each time point separately, resulting thus inferred that strongly vary To account for possibly time-invariant physical couplings within signaling network, we extend traditional graphical lasso...
The pharmacognostic profile of crude drug has a key role in standardization for quality, purity and identification. present study deals with evaluation aerial part Chamaecyparis lawsoniana (Murr.) Parl. used homoeopathic system medicine diverse clinical uses such as terrible pain stomach, tumors, keloid, warts lipoma thigh. includes collection, identification, macroscopy, microscopy organoleptic characteristics lawsoniana. Anatomically the leaf is distinguishable into layer epidermis...